diff --git a/Tests/test_deprecate.py b/Tests/test_deprecate.py
index 30ed4a8081d..3375eb6b282 100644
--- a/Tests/test_deprecate.py
+++ b/Tests/test_deprecate.py
@@ -11,6 +11,11 @@
             "Old thing is deprecated and will be removed in Pillow 10 "
             r"\(2023-07-01\)\. Use new thing instead\.",
         ),
+        (
+            11,
+            "Old thing is deprecated and will be removed in Pillow 11 "
+            r"\(2024-10-15\)\. Use new thing instead\.",
+        ),
         (
             None,
             r"Old thing is deprecated and will be removed in a future version\. "
diff --git a/src/PIL/_deprecate.py b/src/PIL/_deprecate.py
index 7c4b1623d26..fa6e1d00c61 100644
--- a/src/PIL/_deprecate.py
+++ b/src/PIL/_deprecate.py
@@ -47,6 +47,8 @@ def deprecate(
         raise RuntimeError(msg)
     elif when == 10:
         removed = "Pillow 10 (2023-07-01)"
+    elif when == 11:
+        removed = "Pillow 11 (2024-10-15)"
     else:
         msg = f"Unknown removal version, update {__name__}?"
         raise ValueError(msg)